qi ‘i. Perigynia twice as long as the 
Zv scales, tending to lanceolate //. Ge illota 
—— 
‘G Perigynia but little longer than 
2othe scales, tending to ovate )2, 24 Hoodii 
/» Staminate flowers borne at the base of the 
spikes, usually not readily perceptible in 
fruit except in the terminal spike, the 
Ilo upper scales, however, always containing 
achenes when fully developed, the lowermost 
the naked filaments. js 
/ Leaves mostly longer than the culms; margins 
/$ of perigynia acute but not narrowly winged saoniaee arcta 
893 | 
ty p»{ Leaves matly shorter than the 
. FA be 9: cos Cgolaspvenmarses) very thin and sharp : “Cor very) 
j/> 6a.Clusters pieagesToaaaytes bractless, the 
M lowermost bract scarcely ienger 
AO\ than the lowermost spike 
/& Beak of the perigynium flattened and 
minutely ciliolate-serrulate to 
@ 22 the tip; individual spikes 
readily distinguished, the lower- 
ost 4-6 mm. thick. 
20 Perigynia 3-3.5 mm. long /4. Ge Bebbii 
’ 
E 
x 
4 
E 
F 
x 
fo Perigynia 4-4.5 mn. long 15: Ge tribuloides 
/& Beak of the perigynium not flattened, 
minutely ciliolate-serrulate but hardly 
to the tip, often smooth in the 
, upper third; spikes closely crowded 
22 into an ovoid head, the individual 
ones not readily distinguished, 
the lowermost mostly 3-4 m. 
hick. 
3c Seales canpletely covering the 
¥ mm Lee perigynia, the beaks of 
ee nee ae ey seri Saisie 
d 
hich are scarcely 1 mm. long. C.« Ca phaeocephala 
39 Scales shorter than the mature 
/perigynia, the more elongate 
206 beaks of which protrude fran 
'‘\beneath them 
2:2, Both faces of the perigynia 
; Clearly veined throughout, 
‘ the flat surface with 3-5, the 
, &, 
ato \rounded with 7-9 veins /7, C. abrupte 
